Gustavo González / SimpleModbusSlave

SimpleModbusSlave allows you to communicate to any slave using the Modbus RTU protocol. The crc calculation is based on https://os.mbed.com/users/jpelletier/code/CRC/ The functions implemented are functions 3 and 16. read holding registers and preset multiple registers of the Modbus RTU Protocol. This implementation DOES NOT fully comply with the Modbus specifications.

Diff: lib_crc.h

Revision:
0:7c5265097fd2
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/lib_crc.h	Tue Oct 10 12:22:31 2017 +0000
@@ -0,0 +1,12 @@
+#ifndef _LIB_CRC_H_
+#define _LIB_CRC_H_
+
+#include <stdint.h>
+
+#define CRC_VERSION     "2.0"
+
+uint16_t update_crc16_reflected( uint16_t *table, uint16_t crc, char c );
+uint16_t update_crc16_A001( uint16_t crc, char c );
+uint16_t calculate_crc16_Modbus(char *p, unsigned int length);
+
+#endif /* _LIB_CRC_H_ */